{"product_id":"a-premium-o2-oxygen-sensor-for-chevy-gmc-buick-hummer-downstream-4-wire-heated-400mm-lead","title":"A-Premium O2 Oxygen Sensor for Chevy GMC Buick Hummer – Downstream 4-Wire Heated, 400mm Lead","description":"\u003cp\u003e\u003cstrong\u003eA-Premium's downstream heated 4-wire O2 oxygen sensor replaces your factory unit for compatible Chevy, GMC, Buick, Hummer and related models to restore accurate exhaust oxygen readings.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhen your check engine light flags an O2 sensor or your vehicle shows reduced fuel efficiency and rough idle, this direct-fit downstream oxygen sensor is a common replacement choice. Built to match common OE specifications, the A-Premium sensor uses a threaded, heated sensing element with a 4-wire male connector and a 400 mm lead to plug into the factory harness without splicing. It’s sold individually in protective box packaging and comes with reference numbers often used to verify compatibility.\u003c\/p\u003e\n\n\u003ch3\u003eWhich vehicles and engine types will this A-Premium oxygen sensor fit?\u003c\/h3\u003e\n\n\u003cp\u003eThis downstream sensor is listed for many General Motors family vehicles and related models across 2007–2017 model years. It fits multiple engine displacements and both four- and six-cylinder applications, typically occupying Bank 1 Sensor 2 (B1S2) and in some models Bank 2 Sensor 2 (B2S2).\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eBuick: Enclave 2008 3.6L, LaCrosse 2010 2.4L, Lucerne 2009–2011 3.9L, Rainier 2007 4.2L\u003c\/li\u003e\n  \u003cli\u003eChevrolet: Equinox\/Malibu\/Orlando\/Captiva Sport\/Colorado\/Trailblazer 2007–2017 2.4L–4.2L\u003c\/li\u003e\n  \u003cli\u003eGMC\/Hummer\/Pontiac\/Saab\/Saturn\/Isuzu: Acadia\/Canyon\/Envoy\/Terrain\/H3\/Outlook\/9-7x\/Aura\/Vue\/Solstice\/Ascender\/i-series\u003c\/li\u003e\n  \u003cli\u003eReference numbers: 12599204, 12604538, 12617907, 12597947, 12618010, 12618012, 250-24708\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the sensor’s specification matter for fit and performance?\u003c\/h3\u003e\n\n\u003cp\u003eSpec details determine electrical compatibility, mounting method and wire routing. This A-Premium unit is a threaded, heated sensor with four wires and a 400 mm cable length — a common OE-style configuration that supports on-board diagnostics and rapid warm-up for accurate readings.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eWire quantity: 4 — provides heater power plus signal\/ground connections\u003c\/li\u003e\n  \u003cli\u003eOverall length: 400 mm — suits factory harness routing in listed models\u003c\/li\u003e\n  \u003cli\u003eMounting type: threaded — installs into standard exhaust bung\u003c\/li\u003e\n  \u003cli\u003eConnector gender: male — designed to mate with factory female harness\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I expect during installation and troubleshooting?\u003c\/h3\u003e\n\n\u003cp\u003eInstallation typically requires an oxygen sensor socket or a wrench and basic hand tools. Replace the sensor while the exhaust is cool or use proper safety gloves; avoid pulling or twisting the wiring harness. After installation, clear stored codes and run the vehicle to confirm the check engine light and any drivability issues are resolved.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eTools: O2 sensor socket, ratchet, penetrating lubricant if sensor is seized\u003c\/li\u003e\n  \u003cli\u003eInstallation tip: ensure correct thread engagement and do not over-torque\u003c\/li\u003e\n  \u003cli\u003ePost-install: clear ECU codes and perform a short drive cycle to verify operation\u003c\/li\u003e\n  \u003cli\u003ePackaging: single sensor shipped in a protective box\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre there part numbers and compatibility checks I should confirm before buying?\u003c\/h3\u003e\n\n\u003cp\u003eCross-referencing the listed reference numbers and checking bank\/sensor position against your vehicle’s service information helps ensure a match. This A-Premium sensor lists multiple GM reference numbers used by dealers and aftermarket suppliers — use them together with year, make, model and engine size when ordering.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCommon references included: 12599204, 12604538, 12617907, 12597947\u003c\/li\u003e\n  \u003cli\u003eConfirm bank position: B1S2 or B2S2 as required for your vehicle\u003c\/li\u003e\n  \u003cli\u003eCompare connector style and wire count to the factory sensor\u003c\/li\u003e\n  \u003cli\u003eVerify engine displacement and model year against fitment list\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This A-Premium downstream heated oxygen sensor is intended for DIY mechanics, independent shops and fleet technicians replacing a failing or aged O2 sensor on compatible GM and related vehicles. It suits anyone who needs a direct-fit, 4-wire heated sensor with standard threaded mounting and factory-style connector for straightforward replacement.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this oxygen sensor a direct replacement for my GM vehicle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: In many cases yes—confirm year, make, model, engine size and bank\/sensor position against the compatibility list and reference numbers before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What tools do I need to install the A-Premium O2 sensor?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: You typically need an O2 sensor socket or wrench, a ratchet, and penetrating lubricant for a seized sensor.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"A-Premium","offers":[{"title":"Default Title","offer_id":67591364870329,"sku":"B07MMHT1ZP","price":62.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/a-premium-front-view-packaging_46530224-a448-4d71-948a-51c376a652de.jpg?v=1790548722","url":"https:\/\/redleafauto.ca\/products\/a-premium-o2-oxygen-sensor-for-chevy-gmc-buick-hummer-downstream-4-wire-heated-400mm-lead","provider":"Redleaf Auto","version":"1.0","type":"link"}